After one of the shortest chapters, you get one of the longest. There are distinct breaks between mini-scenarios on your way through Lazarevic's stronghold, and they help with the pacing, but it's still a very long chapter. The goal is to make your way through tons of Lazarevic's outposts to the main part of the Monastery, still attempting to rescue Schäfer from his no doubt awful fate. The action happens in stages with a bit of slowdown in between, usually having to do with platforming. When the action starts back up, you'll be able to start out stealthily, so use that to your advantage.
A silent beginning
Start out by climbing the rest of the way up the cliff, then take the path around to some more handholds below a guard. When his boss gets far enough away (back by the side of the truck), stealth grab him while hanging below, making sure to press right after stealth grabbing to get his gun. Jump up and get cover behind the crates at the back of the truck and watch the commander's conversation with the other guard. The guard walks back toward you and posts with his back to you, where you can stealth attack him. Head around to the right of the truck you're behind and wait for the far guard at the end of the area to turn back around after talking to the boss. Head up the side of the truck and get cover to the side of the crates by the guard once he settles in. When the boss continues his patrol past you, back to the back of the truck, take this guard out as well. Quickly follow the boss around the truck and stealth him, then go to the front of the area and take out the last guard in the same way. Head back to the rear of the area with the big gate the trucks came through. Shoot down the 073Tibetan Silver Earring from atop the middle of the gate, the go up the stairs at the front of the area and follow the path around the mountain.
At the top, take cover behind a large step and check out the guards beyond. You can cross the last plank in the bridge ahead, then get cover behind the low wall there and wait for the guard on the right to lean against the corner of the building. Sneak up beside him and stealth him from around the corner, but take your time, because if one of the underling guards inside sees you while he's walking to where he sits down, he'll alert the guards. You can stealth all the lower guards, meaning all the ones that don't wear black outfits. If you take out the higher ranked ones, the guards will start to notice. When the guy at the fire-barrel isn't looking, move over to the small wall at the edge of the cliff and go over. Circle around the edge of the platform until you're below where he stops after leaving the fire. He's in a black outfit, but if you stealth grab him over the side there's no body to alert the others. From there you can hop up and stealth grab the guard sitting on the wall with his back to you. Watch the two guys in black patrolling inside, then when their backs are to you, go back to the edge of the platform over the chasm and drop over the side again. You should see a long red beam below you, running out toward the chasm. Drop down to it and go to the end where you'll find the 074Ritual Crown. Climb back up and around, then keep going along the red boards going up the side of the building. Take them around the side until you can jump to the next wooden platform where another guard is patrolling. Stealth him when he walks over by you, and that marks the last of the regular soldiers you'll be able to take out.
Take out the machine gun
Move into the dark building from the platform, and you'll find some more weapons and a grenade. This is a good place to start your assault, because it provides good cover and you'll be able to see across the courtyard to where the enemies start dropping in. Elena will join you, and you'll know you've got them all when she takes off to the middle of the courtyard, and finds cover behind some low walls by the bridge. There's a machine gun emplacement on the other side of the river, and you'll need to push the cart in the middle across to get to the other side. Crouch behind it and push it like normal. When it gets over there and stalls, a bunch of guys will assault from the front and right. Drop down to the lower platform on the left, then quickly take the log across below the bridge. Jump to the climbable stones you'll find over there, then go to the top of the ledge and stealth grab the two guys at the top if they're close enough, or just shoot them. Hanging from the edge, you can also shoot two more guys on the stairs. Hop up and grab some cover, then work on taking out the remaining three enemies up here, including one of the heavily armored shotgunners.
Jump down toward the machine gun, making sure to stay behind the walls to the right. This leads you inside the building, where you can get around behind the machine gun. The gunner isn't alone, so use a grenade to clear them out, or grab the propane tank from when you first started entering the building and use that. Wipe up the rest of the guys and get behind the turret, because Elena is getting assaulted and you need to protect her while she gets over to you. Guys drop down all over the place on the other side of the river, so just light them up, making sure to take out the guys closest to Elena first, then the ones with laser scopes. When they're all dead, Elena will tell you so. From the turret, go to river outside the building and you'll see a space in the wall there. Drop down over the side so you're just above the river, then jump up to the red boards on the back side of the wall. Climb over to the right and grab the 075Silver Official Seal, then head back inside the building where Elena should be waiting. At the other end is a doorway you can open by cranking the chain mechanism on the left. Make sure you tap the whole time, or you'll drop the door.
Get into the tower
The pathway is broken beyond the door, so you'll need to get the rope below you for Elena. Climb the red boards on the left down, jump to the inside wall and keep going down to the bottom. There you'll be able to jump across to the ledge with the rope. When Elena gets down, cross the fallen beam to the other side. Once there, jump across the gap to some orange stones and climb them up and around until you can jump behind you to another ledge. Turn around at the ledge and face Elena, then press to have her jump up to you. Go around to the other side of the statue and crouch behind it. When Elena joins you, push it over to create a way out. Climb up the statue then head out and around to your left, edging around the stone along the narrow boards. Climb up the rope at the end to catch a glimpse of Lazarevic with Schäfer. Jump across to a different stone outcropping following Elena, but instead of jumping up and taking the stairs after her, drop off the right side of the platform and follow it around to the 076Silver Offering Pot. Now you can go up and follow Elena up some steps, then jump to more steps you can go up. After another jump and some more steps, you'll find yourself at the top with a locked door.
Across from the stairs you came up, there is a red board in the last pillar on the broken side of the platform. Jump to it, then go around to the left of the pillar and climb up to the top. There's a platform at the top, from which you can jump to a beam sticking out on the other side of the main area where Elena is below you. Jump over to it, then take it around until you can jump to the bricks in the white wall of the building you're trying to get into. Jump over to them and take them around to the other side of the building, and over to the small roof on that side. Drop down to the ledge below the roof, then look up and shoot down the 077Tibetan Turquoise Ring from under the roof. Go up the red boards on the side, then cross the roof back to the white stones you were on. Go back around the corner, and they'll eventually lead you to the wooden platform above the locked door. Climb up onto it and take the red boards farther up the wall until you can jump to a red post. Take those to the right and swing across them all the way around to the other side where you can make it to another platform at the top of the building. Stealth grab the guard, and climb up.
From one building to the next
On top of the roof you'll see a short beam sticking out from one side of the floor and a guard patrolling on a landing below and to the right of it. Walk out to the end of the beam and jump to the smaller wooden beam spanning the gap above him. Drop down behind him and stealth attack him. There is a guard on the other side of the room, and he starts patrolling once you get down on his level. He spends most of his time looking the other way, so wait until he's at one of his stopping points, then cross the beam to him and take him down. That's the end of the stealth portion, because no matter how well you have stealth killed the previous guards, as soon as you set foot on the next floor down, all the guys will somehow be alerted to your presence. So even stealth killing the rest of the guards down below seems like a viable proposition, you may just want to start shooting at them while you still have the height advantage since it is impossible to remain stealth. Use cover and move around as needed while you clear the floors from above. There are four guys on the floor below you, and groups on each of the floors below that. When you've cleared them all out, head to the bottom to open the door for Elena.
When you do, the wall will be blasted open and you'll find yourself under attack by an RPG gunner in the next building covering the guys coming across the bridge. Get to cover behind some crates in the middle of the room with a Dragon Sniper behind it. Use that to take out the RPG gunner first, then the sniper with the laser sight on the bottom left of the next building over. Use the remaining ammo to take out approaching bad guys, then switch to something else and continue taking them down. They have to come to you from one narrow approach, so take your time and pick them all off. A guy with a riot shield is most easily taken down with a grenade, but don't bother with the shield, as you'll want to use an assault rifle for this section. When that's over, head across the bridge and get cover behind the crates before the entrance. Take out the guy with the laser sight to the left of the building, then move to cover outside the doorway and start working on the guards in there. Take out the black-armored shotgunner on the bottom floor first, then the two guys up on the next floor. After you've cleared the bottom floor and the guys shooting you from above, go out the hole in the wall in the corner just to the right of where you entered. Climb down the white stones there and around the building down to the 078Carved Wooden Ghurra.
Take out the sniper nests
Head back up and boost Elena up the ladder at the back of the room. When you follow her up, some guys come down to the floor above and you'll still have to watch for the snipers with their laser scopes coming through the broken walls. You may not be able to take out all three of the guys that come from above from behind the crates at the top of the ladder, so cross to the other side of the room, away from the snipers, and take them out from there. Climb up two more ladders and go around the floor to an opening in the wall. On the outside of it, you'll be able to climb some red and white stones to the top of the building or the red boards in one of the pillars. Up on top, you'll find some sniper rifles. Across the way, where the snipers are firing from, you'll see four large towers. The first thing you'll want to do is take out the RPG gunner on the lower balcony of the second tower from the right. After that, start picking off snipers. After killing one, move to another cover location or they'll hone in on you and take you out when you pop up. At the same time, a bunch of bad guys will cross the bridge to you. Take out all the snipers (don't forget the one down at the end of the bridge) and the other enemies.
Now that no one's shooting at you, go back down to the very bottom of the building and out the side in the direction of the sniper towers to where a broken bridge used to be. It leads to a ledge across a large gap. This is a tough jump to make, but it's doable (try running a step or two beyond the edge before jumping). On the far side, take the two ladders down, then shoot down the treasure on the wall at the bottom to get the 079Bronze Tiger Bell. Head all the way back up to where Elena is waiting for you. Cross the beam to the real bridge where you'll spot Lazarevic and Schäfer again. Start running across the bridge after Elena, where it breaks apart and falls. You'll need to climb up the bridge when it crashes, so just keep heading up, jumping across where you need to until you reach the top. Once you're up there, open the door with Elena and head to the top of the stairs for a huge fight in the main courtyard.
Into the Monastery
Pretty much as soon as you step foot into the Monastery proper, you'll start taking fire. There's no easy way through the firefight – it consists mainly of getting into good position and taking out the various snipers around the area. Head down the steps into the courtyard and immediately run to your left and take cover behind a low wall where you can kill the guy with the laser scope in front of you. From there, jump up to the area where he was, and run to the other end of that roof. You should see a couple bad guys come out from the doorway on the other side, so grab some cover behind one of the red pillars and take them out. You won't have much time to hide there, as snipers in the surrounding buildings have direct shots at you. Hopefully you'll at least have taken one out, then run over to the other one and take him out at close range. Grab the M32 - Hammer one of the guys dropped, then run back behind a pillar and start taking out all the snipers around the area, starting with the ones directly above you. The snipers are the biggest threat to your survival, and after they've been dealt with, you can spend the rest of the time running around the rooftops sniping guys down in the courtyard. Just beware of any guys that come up to the roof you're on through the doorway where you took out the two guys to get the Hammer.
When you've finished the last of them, Elena will start to move, so follow her to a red door on the other side of the courtyard from where you came in. Tap to open the door and head down the stairs on the other side. At the bottom, boost Elena up to the ladder, then swing across the wooden pegs below her. Go to the end and wait for her to lower a board down to you, then follow her up. Jump to the white stones in the wall, and climb up them to the window. Hang there until a guard comes over, then stealth grab him. You can't do this without being seen, so when you go up into the room, be prepared for a gunfight. Take immediate cover behind the crate by the stairs, and make the guy with the riot shield a priority. If you picked up the Desert - 5 in the courtyard (always a good idea), then you can easily take out the remaining guys while staying protected by the riot shield. Just hang back by the window and take them out as they pop out of hiding, then inch forward and shoot the laser scoped enemy up on the landing to the left. At the end of the room is a broken down wall with an archway in it. Beyond the archway is a door to the outside. Head away from the door and climb the armoire by the wall, then jump up to the ledge on that side of the hallway. Face across the hall, shoot down the treasure, then jump to the little alcove it fell into to receive the 080Antique Bronze Lion.
Head outside and go around the corner and down the snow-covered avenue between the two buildings. When you get to the red door in the opposite building, press to head inside.